Re: Inherited guns
That's an 'H-bar'. Stainless steel, very heavy profile for heat dissipation and lessened barrel whip, mainly for bench rest shooting or long range "varminting". No iron sights means it was equipped, at one time, with an "optical" sighting system, probably a high power variable scope. Limited appeal - but usually very accurate - not "tacticool".
How about a pic of the 1911-A1, sounds like a 'modern' Springfield Armory, Inc. made piece?
Jim Hauff ~ H&R Collector In Memory of Bill Goforth and Jim Ritchie